#include <stdio.h>
main()
{ 
FILE*fp ;
int i, a[6]={1,2,3,4,5,6},k;
fp = fopen("data.dat", "w+b") ;
for (i=0; i<6; i++)
{
fseek(fp, 0L,0);
fwrite(&a[5-i], sizeof(int), 1,fp);
}
rewind (fp);
fread(&k,sizeof(int), 1, fp);
fclose(fp);
printf("%d", k);
}
